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Tekonsha
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2007 - 2012 Mazda CX-7
Confirmed to Fit
2014 - 2018 Mazda Grand Vitara
Confirmed to Fit
2004 - 2008 Mazda Swift
Confirmed to Fit
2003 - 2008 Mazda Swift
Confirmed to Fit
2012 - 2017 Toyota Camry
Confirmed to Fit
2007 - 2009 Toyota Camry
Confirmed to Fit
2014 - 2019 Toyota Corolla
Confirmed to Fit
2007 - 2014 Toyota FJ Cruiser
Confirmed to Fit
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Tekonsha T-One connector (also referred to as T-Connector) wiring harnesses are the fastest and easiest way to add an electrical connector to the back of your vehicle. These connectors are used to link the wiring from your vehicle to the trailer when towing. Tekonsha T-One connectors feature custom designs to fit each vehicle make and model based on manufacturer specifications. Plus, the Plug & Play connectors on the end of the wires make it easy to install. No cutting or splicing!
Tekonsha offers the largest, most complete line of T-One connectors. To install a Tekonsha T-One wiring harness, simply locate your vehicle's wiring harness connector typically behind the vehicle taillight - unplug the connection and insert the T-Connector into the vehicle's harness. It's that easy! So what are you waiting for? Hit the road with the peace of mind only Tekonsha can provide. Life's a Journey. Stop Often.
| BRAND: | TEKONSHA |
| PART NUMBER: | 118405 |
| WARRANTY: | LIMITED 1 YEAR WARRANTY |
| WEIGHT: | 1.7 LBS |
| UNIVERSAL OR SPECIFIC FIT: | SPECIFIC |
| CIRCUIT PROTECTED: | YES |
| HARNESS TYPE: | MALE FEMALE |
| TERMINAL QUANTITY: | 4 |
| WIRE COLORS: | BROWN, GREEN, YELLOW, WHITE |
| WIRE QUANTITY: | 4 |
| WIRE GAUGE: | 16 GA. |
| POWER LEAD REQUIRED: | YES |
| ELECTRICAL SYSTEM TYPE: | 3-WIRE SYSTEM |
| HARDWARE INCLUDED: | YES |
Tekonsha is a leading manufacturer of electronic trailer brake controllers, pioneering the category in the 1970s. The lineup spans proportional units such as the Prodigy P3 and Prodigy iD, time-delayed controllers, the wireless Prodigy RF, plus vehicle-specific wiring harnesses, adapters and trailer brake components engineered for smooth, predictable stopping at any speed.
Tekonsha Engineering Company began in 1964 building RV steps and mirrors. Within a few years it had found its real calling, and by the 1970s Tekonsha was pioneering the manufacture of electronic trailer brake controllers, the product category that still defines the brand. More than half a century later it remains the reference name in trailer braking and is part of the Horizon Global group alongside Reese, Draw-Tite, Fulton, Bulldog and Wesbar.
A brake controller is the component that tells a trailer's electric brakes how hard to work and when, and getting that right is the difference between a controlled stop and a shove from behind. Tekonsha builds both major types. Proportional controllers use an internal accelerometer to sense how quickly the tow vehicle is slowing and apply trailer braking to match, so light braking stays light and hard braking is immediate. Time-delayed controllers ramp to a preset output over a fixed interval, a simpler and more economical approach that suits occasional towing.
The current brake controller range covers most of that ground. The Prodigy iD pairs with a phone through Tekonsha's EDGE technology for setup and monitoring, the P3 offers storable settings for multiple trailers and a trilingual colour LED display, the Prodigy P2 adds a dimmable display and boost mode for heavier loads, and the Voyager keeps operation simple and dependable. The Prodigy RF mounts to the trailer itself and controls wirelessly, which suits rental fleets and drivers who swap tow vehicles.
Installation is supported by vehicle-specific brake control harnesses that plug into a factory connector rather than requiring cut-and-splice wiring, along with mounting brackets and adapters. Matched controller bundles pair a unit with the correct harness. Products are tested to meet and often exceed published industry standards.
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8 compatible vehicles
| Year | Make & Model | Style | Notes |
|---|---|---|---|
| 2007 - 2012 | Mazda CX-7 | — | Tow Harness T: Connector Assembly Drilling Required Install Time is 60 minutes |
| 2014 - 2018 | Mazda Grand Vitara | Hatchback | Tow Harness T: Connector Assembly Drilling Required Install Time is 60 minutes |
| 2004 - 2008 | Mazda Swift | Hatchback · 5-Door | Tow Harness T: Connector Assembly Drilling Required Install Time is 60 minutes |
| 2003 - 2008 | Mazda Swift | Sedan · 4-Door | Tow Harness T: Connector Assembly Drilling Required Install Time is 60 minutes |
| 2012 - 2017 | Toyota Camry | — | Tow Harness T: Connector Assembly Drilling Required Install Time is 60 minutes |
| 2007 - 2009 | Toyota Camry | Sedan · 4-Door | Tow Harness T: Connector Assembly Drilling Required Install Time is 60 minutes |
| 2014 - 2019 | Toyota Corolla | Sedan | Tow Harness T: Connector Assembly Drilling Required Install Time is 60 minutes |
| 2007 - 2014 | Toyota FJ Cruiser | — | Tow Harness T: Connector Assembly Drilling Required Install Time is 60 minutes |
The Tekonsha T-One T-Connector Harness, 4-Way Flat, w/Circuit Protected ModuLite Module TK118405 (Part #TK118405) fits 2007-2012 Mazda CX-7 models. The 2019 model year is the last year covered by this part number. For newer models, check for an updated version.
The Tekonsha T-One T-Connector Harness, 4-Way Flat, w/Circuit Protected ModuLite Module TK118405 (Part #TK118405) fits the following vehicles: 2007-2012 Mazda CX-7; 2014-2018 Mazda Grand Vitara; 2003-2008 Mazda Swift; 2007-2009, 2012-2017 Toyota Camry; 2014-2019 Toyota Corolla; 2007-2014 Toyota FJ Cruiser. Always verify your specific year, make, and model before ordering.
Yes, the Tekonsha T-One T-Connector Harness, 4-Way Flat, w/Circuit Protected ModuLite Module TK118405 (Part #TK118405) is designed to fit the 2007-2012 Mazda CX-7.
The Tekonsha T-One T-Connector Harness, 4-Way Flat, w/Circuit Protected ModuLite Module TK118405 (Part #TK118405) Drilling is required for installation. Basic hand tools are typically all you need.
The T-Connector is a trailer wiring adapter that allows you to connect a trailer to your vehicle's electrical system. It taps into your vehicle's existing taillight wiring to provide power for trailer lights. The product includes a black box connector, wiring harnesses with colour-coded wires (red, yellow, green, black, and white), a fuse holder with a 10 amp fuse, butt connectors, an eyelet, a screw, foam-padded tape, double-sided tape, and cable ties.
The T-Connector 18405-037 is designed for Mazda 6 Sedan and Coupe, Toyota Camry, Mazda CX-7, and Toyota FJ Cruiser. Each vehicle has specific installation instructions. If your vehicle is not listed, this product will not fit.
Yes. The Toyota FJ Cruiser has significantly different installation instructions that begin on page 4 of the manual. The FJ Cruiser installation involves removing the jack storage compartment door, threshold plate, trim panels, and access panels. If your vehicle is equipped with an optional subwoofer unit on the passenger side, additional removal steps are required. The wiring connection points and routing are also different from the other supported vehicles.
You will need: a drill with a 3/32" drill bit, a Phillips head screwdriver, a 10mm socket and ratchet or 10mm wrench, wire crimpers, wire cutters, and a trim panel remover tool. These tools are required for the standard installation on Mazda 6, Toyota Camry, and Mazda CX-7. The Toyota FJ Cruiser installation requires the same tools.
Yes. You must disconnect the vehicle's negative (-) battery cable before connecting the fuse holder to the positive battery cable. This is done in step 7 of the installation. After all wiring connections are complete, you reconnect the negative battery cable in step 8 and install the 10 amp fuse.
Drilling is required only for the grounding connection (step 5). You must drill a 3/32" hole to secure the white ground wire using the supplied eyelet and screw. However, if your vehicle has an existing ground stud, you can use that instead by loosening the bolt, placing the screw eyelet on the stud, and re-tightening the bolt. Before drilling, you must verify what is behind the surface to avoid damage to the vehicle or personal injury. Do not drill into any exposed surfaces.
Yes, depending on your vehicle. For Toyota Camry and Mazda CX-7, you must carefully slit a rubber grommet to route the black 12 gauge wire out underneath the vehicle. For Mazda 6 Sedan and Coupe, the wire is routed through the taillight socket opening instead. For Toyota FJ Cruiser, you must cut a hole in the rubber grommet located near the wheel well to route the black wire through.
The T-Connector uses colour-coded wires for different functions: Red wire connects to the driver's side taillight for stop/turn signals; Yellow wire connects to the driver's side taillight for additional stop/turn signals; Green wire connects to the passenger's side taillight for stop/turn signals; Black wire connects to the vehicle's positive battery through a 10 amp fuse for power; White wire is the ground connection to the vehicle's chassis or frame.
The 10 amp fuse protects the circuit from overload. It is installed in the yellow fuse holder provided with the T-Connector. The fuse holder is connected between the black 12 gauge wire (which runs from the vehicle's positive battery terminal) and the black wire from the T-Connector black box. The fuse must be installed in step 8 after all other connections are complete.
Approximately 2 feet (0.60 meters) of black 12 gauge wire is routed into the trunk area. The remaining wire is routed through the opening in the taillight socket and behind the bumper (for Mazda 6), or out underneath the vehicle (for Toyota Camry and Mazda CX-7), or along the frame rail and through a grommet near the wheel well (for Toyota FJ Cruiser).
The T-Connector has the following maximum load limits: Max. stop/turn light: 1 per side (2.1 amps); Max. tail lights: (4.2 amps). Do not exceed the lower of your towing manufacturer's rating or these limits. Overloading the circuit can cause fires. Consult your vehicle's owner's manual and instruction sheet for additional information about your specific towing capacity.
After installation is complete, test and verify the installation with a test light or by connecting an actual trailer. All connections must be complete for the T-Connector to function properly. The manual emphasizes that testing is essential before using the T-Connector with a trailer.
After installation, verify that: all wiring connectors are fully inserted with locking tabs in place; the taillight housing is properly seated on its alignment tab (Mazda 6); the black wire is positioned between the taillight housing gasket and foam-padded tape (Mazda 6); all cable ties are secure and wires are protected from pinching or cutting; the T-Connector black box is securely mounted with double-sided tape; the 10 amp fuse is installed in the fuse holder; the negative battery cable is reconnected; and the installation functions properly with a test light or trailer.
The T-Connector black box is mounted on the driver's side on the floor of the rear cargo area. The area must be cleaned with a mixture of rubbing alcohol and water before mounting. The black box is secured using the double-sided tape provided with the T-Connector. After mounting, the trunk threshold and felt trunk liner are replaced.
The black 12 gauge wire must be routed carefully from the vehicle's positive battery terminal to the T-Connector black box. You must avoid hot pipes, heat shields, the fuel tank, and any other points that may pinch or break the wire. For Mazda 6, Toyota Camry, and Mazda CX-7, the wire is routed underneath the bumper and into the engine compartment. For Toyota FJ Cruiser, the wire is routed from the front of the vehicle along the frame rail rearward to the rear driver's side, then through a rubber grommet near the wheel well.
No. Only the Mazda 6 Sedan and Coupe require removal of the driver's side taillight housing. For Toyota Camry and Mazda CX-7, the taillight housing is not removed; instead, you access the wiring through the trunk area and route the black wire through a rubber grommet. For Toyota FJ Cruiser, the taillight connectors are accessed by removing interior trim panels and access panels, but the taillight housing itself is not removed.
The foam-padded tape is applied to the driver's side taillight socket area (Mazda 6 only) to cover any sharp edges on the sheet metal. The black 12 gauge wire is positioned between the taillight housing gasket and the foam-padded tape to protect the wire from being pinched or damaged. The area must be cleaned with a mixture of rubbing alcohol and water before applying the tape.
The yellow butt connector is used to join two wires together. In the T-Connector installation, it is used in two places: (1) to connect the black 12 gauge wire and the red wire from the T-Connector black box (step 4), and (2) to connect the fuse holder to the black 12 gauge wire from the battery (step 7). The yellow butt connector is supplied with the T-Connector kit.
The T-Connector has separate harnesses with colour-coded wires that plug into the vehicle's existing taillight connectors. On the driver's side, attach the T-Connector harnesses containing the red and yellow wires to the connection points on the back of the driver's side taillight housing. On the passenger's side, attach the T-Connector harness containing the green wire to the connection points on the back of the passenger's side taillight housing. Ensure that all connectors are fully inserted with locking tabs in place. For Toyota FJ Cruiser, the connections are made to the vehicle's 3-pin and 2-pin rear tail lamp connectors.
The 4-flat connector should be stored in the rear cargo area (trunk) when not in use. This keeps it protected and readily available when you need to connect a trailer.
The cable ties are used to secure the remainder of the T-Connector harness to prevent damage or rattling. They must be applied carefully to avoid any areas that would cut or pinch the wire. Proper cable tie placement protects the wiring from being damaged during vehicle operation.
If your Toyota FJ Cruiser is equipped with an optional subwoofer unit on the passenger side, you must remove it before installing the T-Connector. The subwoofer removal involves: removing the access panel below the subwoofer; removing the front trim/grill assembly (8 clips); removing four 10mm bolts (an extension is needed for the two upper bolts); disconnecting the wiring harness; and carefully removing the subwoofer unit. After the T-Connector installation is complete, you must reinstall the subwoofer unit and ensure its connection plug is fully inserted.
For Toyota FJ Cruiser: (1) Locate the trailer wiring harness on the driver's side and route the red and yellow wire harnesses behind the trim panel to the access panel location; (2) Locate the vehicle's 3-pin rear tail lamp connector, separate it, and plug the red wire harness between the separated halves; (3) Locate the vehicle's 2-pin rear tail lamp connector, separate it, and plug the yellow wire harness between the separated halves; (4) Route the green wire harness to the passenger's side by routing it out of the driver's side trim panel, along the rear threshold area, behind the passenger's side trim panel, to the access panel location; (5) Repeat the 2-pin connector connection using the green wire harness on the passenger's side.
On the Toyota FJ Cruiser, the white ground wire with the ring terminal is connected to the bolt on the left side of the jack inside the jack storage compartment. You remove the bolt using a 10mm socket, place the ring terminal on the bolt, and re-tighten the bolt to secure the ground connection.
Yes. Disconnect the vehicle's negative (-) battery cable before connecting the fuse holder to the positive battery terminal. Reconnect it after all wiring is complete and the 10 amp fuse is installed.
The T-Connector uses a 10 amp fuse installed in the yellow fuse holder provided. This fuse protects the circuit from overload. Do not exceed the maximum load limits: 1 stop/turn light per side (2.1 amps) or max. tail lights (4.2 amps).
Max. stop/turn light: 1 per side (2.1 amps); Max. tail lights: (4.2 amps). Do not exceed the lower of your towing manufacturer's rating or these limits. Overloading can cause fires.
Verify that all connections are complete and fully inserted. Check that all T-Connector harnesses are properly connected to the vehicle's taillight connectors with locking tabs in place. Verify that the black 12 gauge wire is properly connected to the red wire from the T-Connector black box using the yellow butt connector. Verify that the white ground wire is properly secured to a ground point. Verify that the fuse holder is properly connected to the vehicle's positive battery terminal and that the 10 amp fuse is installed. Verify that the negative battery cable is reconnected. Test the installation with a test light or trailer to confirm proper operation.
Ensure that the black 12 gauge wire is positioned correctly between the taillight housing gasket and the foam-padded tape. Verify that the foam-padded tape is properly applied to the taillight socket area and covers any sharp sheet metal edges. Carefully replace the taillight housing, ensuring it is properly seated on its alignment tab. Replace the two 10mm nuts and tighten them securely. The taillight housing should sit flush against the vehicle body with no gaps.
For Toyota FJ Cruiser, the tail lamp plug area is very small and may be difficult to reach with your hands. Long nose pliers may be used to assist in the removal and connection of the plugs. Ensure that you are inserting the connectors straight and fully, with locking tabs properly engaged. Do not force the connectors, as this may damage the locking tabs.
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Ann
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May 22, 2023
